31144122 has 16 divisors (see below), whose sum is σ = 69209280. Its totient is φ = 10381356.

The previous prime is 31144111. The next prime is 31144147. The reversal of 31144122 is 22144113.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31144095 and 31144104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288318 + ... + 288425.

It is an arithmetic number, because the mean of its divisors is an integer number (4325580).

Almost surely, 2^31144122 is an apocalyptic number.

31144122 is an abundant number, since it is smaller than the sum of its proper divisors (38065158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31144122 is a wasteful number, since it uses less digits than its factorization.

31144122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576754 (or 576748 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 31144122 is about 5580.6918925882. The cubic root of 31144122 is about 314.6241321801.

Adding to 31144122 its reverse (22144113), we get a palindrome (53288235).

Subtracting from 31144122 its reverse (22144113), we obtain a palindrome (9000009).

The spelling of 31144122 in words is "thirty-one million, one hundred forty-four thousand, one hundred twenty-two".